This is a ladder of our own. It is build parsing ladder log to capture death, suicide, tk, etc ... A php script deal with this and send to arma this table at the end (I think) of each match ...
The same script deal with map rotation, moving zones, etc ...
It's a good amount of work to reach that but the basics are quite simple.

If you just want to send the top 10 of the current ladder at the end of a match, I suggest a simple script to detect end of a match in ladderlog.txt or directly using server output, then use the ladder.txt or the highscore.txt.